GeForce 9800 GTX vs Radeon R5 M255

Intro

Compare those specifications to the Radeon R5 M255, which makes use of a 28 nm design. AMD has clocked the core frequency at 940 MHz. The DDR3 RAM works at a frequency of 1000 MHz on this specific card. It features 320 SPUs along with 20 TAUs and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce 9800 GTX should theoretically be a lot superior to the Radeon R5 M255 in general. (explain)

GeForce 9800 GTX		70400 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 54400 (340%)

Texel Rate

The GeForce 9800 GTX will be a lot (approximately 130%) more effective at texture filtering than the Radeon R5 M255. (explain)

GeForce 9800 GTX		43200 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 24400 (130%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 9800 GTX is a better choice, by a large margin. (explain)

GeForce 9800 GTX		10800 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 3280 (44%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.